Mushrooms have tremendous health benefits and are often overlooked. They bring vital nutrients to the body, can reduce inflammation and may even shrink tumors. For the dieter, eating mushrooms will make you feel satisfied. The reason is that mushrooms contain antioxidants, pantothenic acid, fiber, selenium, niacin, riboflavin, selenium and copper. "They are also low in both calories and energy density, making them a good way to fill up without going over your daily calorie limit. This allows you to lose weight and fat without feeling deprived," healthyeating.com reported. The research found that people who switched out their meat and replaced it with mushrooms consumed fewer calories and lost more weight and body fat.